Picat General Science 3

Question 1

Which organelle is responsible for producing most of the energy (ATP) in a cell?

Accepted Answer

Mitochondria

Answer

Mitochondria generate ATP through cellular respiration and are often called the powerhouse of the cell.

Question 2

How many chambers does the human heart have?

Accepted Answer

4

Answer

The human heart has four chambers: the left and right atria and the left and right ventricles.

Question 3

Which type of blood cell is primarily responsible for fighting infections?

Accepted Answer

White blood cells

Answer

White blood cells (leukocytes) are the main components of the immune system that identify and destroy pathogens.

Question 4

What term describes organisms that can produce their own food using sunlight?

Accepted Answer

Autotrophs

Answer

Autotrophs, such as plants and algae, use photosynthesis to convert sunlight and CO₂ into glucose.

Question 5

What is the basic unit of heredity that carries genetic information?

Accepted Answer

Gene

Answer

A gene is a specific sequence of DNA that codes for a particular trait or protein.

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